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10#include <linux/mount.h>
11#include <linux/compat.h>
12#include <asm/uaccess.h>
13#include "ext3.h"
14
15long ext3_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
16{
17 struct inode *inode = file_inode(filp);
18 struct ext3_inode_info *ei = EXT3_I(inode);
19 unsigned int flags;
20 unsigned short rsv_window_size;
21
22 ext3_debug ("cmd = %u, arg = %lu\n", cmd, arg);
23
24 switch (cmd) {
25 case EXT3_IOC_GETFLAGS:
26 ext3_get_inode_flags(ei);
27 flags = ei->i_flags & EXT3_FL_USER_VISIBLE;
28 return put_user(flags, (int __user *) arg);
29 case EXT3_IOC_SETFLAGS: {
30 handle_t *handle = NULL;
31 int err;
32 struct ext3_iloc iloc;
33 unsigned int oldflags;
34 unsigned int jflag;
35
36 if (!inode_owner_or_capable(inode))
37 return -EACCES;
38
39 if (get_user(flags, (int __user *) arg))
40 return -EFAULT;
41
42 err = mnt_want_write_file(filp);
43 if (err)
44 return err;
45
46 flags = ext3_mask_flags(inode->i_mode, flags);
47
48 mutex_lock(&inode->i_mutex);
49
50
51 err = -EPERM;
52 if (IS_NOQUOTA(inode))
53 goto flags_out;
54
55 oldflags = ei->i_flags;
56
57
58 jflag = flags & EXT3_JOURNAL_DATA_FL;
59
60
61
62
63
64
65
66 if ((flags ^ oldflags) & (EXT3_APPEND_FL | EXT3_IMMUTABLE_FL)) {
67 if (!capable(CAP_LINUX_IMMUTABLE))
68 goto flags_out;
69 }
70
71
72
73
74
75 if ((jflag ^ oldflags) & (EXT3_JOURNAL_DATA_FL)) {
76 if (!capable(CAP_SYS_RESOURCE))
77 goto flags_out;
78 }
79
80 handle = ext3_journal_start(inode, 1);
81 if (IS_ERR(handle)) {
82 err = PTR_ERR(handle);
83 goto flags_out;
84 }
85 if (IS_SYNC(inode))
86 handle->h_sync = 1;
87 err = ext3_reserve_inode_write(handle, inode, &iloc);
88 if (err)
89 goto flags_err;
90
91 flags = flags & EXT3_FL_USER_MODIFIABLE;
92 flags |= oldflags & ~EXT3_FL_USER_MODIFIABLE;
93 ei->i_flags = flags;
94
95 ext3_set_inode_flags(inode);
96 inode->i_ctime = CURRENT_TIME_SEC;
97
98 err = ext3_mark_iloc_dirty(handle, inode, &iloc);
99flags_err:
100 ext3_journal_stop(handle);
101 if (err)
102 goto flags_out;
103
104 if ((jflag ^ oldflags) & (EXT3_JOURNAL_DATA_FL))
105 err = ext3_change_inode_journal_flag(inode, jflag);
106flags_out:
107 mutex_unlock(&inode->i_mutex);
108 mnt_drop_write_file(filp);
109 return err;
110 }
111 case EXT3_IOC_GETVERSION:
112 case EXT3_IOC_GETVERSION_OLD:
113 return put_user(inode->i_generation, (int __user *) arg);
114 case EXT3_IOC_SETVERSION:
115 case EXT3_IOC_SETVERSION_OLD: {
116 handle_t *handle;
117 struct ext3_iloc iloc;
118 __u32 generation;
119 int err;
120
121 if (!inode_owner_or_capable(inode))
122 return -EPERM;
123
124 err = mnt_want_write_file(filp);
125 if (err)
126 return err;
127 if (get_user(generation, (int __user *) arg)) {
128 err = -EFAULT;
129 goto setversion_out;
130 }
131
132 mutex_lock(&inode->i_mutex);
133 handle = ext3_journal_start(inode, 1);
134 if (IS_ERR(handle)) {
135 err = PTR_ERR(handle);
136 goto unlock_out;
137 }
138 err = ext3_reserve_inode_write(handle, inode, &iloc);
139 if (err == 0) {
140 inode->i_ctime = CURRENT_TIME_SEC;
141 inode->i_generation = generation;
142 err = ext3_mark_iloc_dirty(handle, inode, &iloc);
143 }
144 ext3_journal_stop(handle);
145
146unlock_out:
147 mutex_unlock(&inode->i_mutex);
148setversion_out:
149 mnt_drop_write_file(filp);
150 return err;
151 }
152 case EXT3_IOC_GETRSVSZ:
153 if (test_opt(inode->i_sb, RESERVATION)
154 && S_ISREG(inode->i_mode)
155 && ei->i_block_alloc_info) {
156 rsv_window_size = ei->i_block_alloc_info->rsv_window_node.rsv_goal_size;
157 return put_user(rsv_window_size, (int __user *)arg);
158 }
159 return -ENOTTY;
160 case EXT3_IOC_SETRSVSZ: {
161 int err;
162
163 if (!test_opt(inode->i_sb, RESERVATION) ||!S_ISREG(inode->i_mode))
164 return -ENOTTY;
165
166 err = mnt_want_write_file(filp);
167 if (err)
168 return err;
169
170 if (!inode_owner_or_capable(inode)) {
171 err = -EACCES;
172 goto setrsvsz_out;
173 }
174
175 if (get_user(rsv_window_size, (int __user *)arg)) {
176 err = -EFAULT;
177 goto setrsvsz_out;
178 }
179
180 if (rsv_window_size > EXT3_MAX_RESERVE_BLOCKS)
181 rsv_window_size = EXT3_MAX_RESERVE_BLOCKS;
182
183
184
185
186
187 mutex_lock(&ei->truncate_mutex);
188 if (!ei->i_block_alloc_info)
189 ext3_init_block_alloc_info(inode);
190
191 if (ei->i_block_alloc_info){
192 struct ext3_reserve_window_node *rsv = &ei->i_block_alloc_info->rsv_window_node;
193 rsv->rsv_goal_size = rsv_window_size;
194 }
195 mutex_unlock(&ei->truncate_mutex);
196setrsvsz_out:
197 mnt_drop_write_file(filp);
198 return err;
199 }
200 case EXT3_IOC_GROUP_EXTEND: {
201 ext3_fsblk_t n_blocks_count;
202 struct super_block *sb = inode->i_sb;
203 int err, err2;
204
205 if (!capable(CAP_SYS_RESOURCE))
206 return -EPERM;
207
208 err = mnt_want_write_file(filp);
209 if (err)
210 return err;
211
212 if (get_user(n_blocks_count, (__u32 __user *)arg)) {
213 err = -EFAULT;
214 goto group_extend_out;
215 }
216 err = ext3_group_extend(sb, EXT3_SB(sb)->s_es, n_blocks_count);
217 journal_lock_updates(EXT3_SB(sb)->s_journal);
218 err2 = journal_flush(EXT3_SB(sb)->s_journal);
219 journal_unlock_updates(EXT3_SB(sb)->s_journal);
220 if (err == 0)
221 err = err2;
222group_extend_out:
223 mnt_drop_write_file(filp);
224 return err;
225 }
226 case EXT3_IOC_GROUP_ADD: {
227 struct ext3_new_group_data input;
228 struct super_block *sb = inode->i_sb;
229 int err, err2;
230
231 if (!capable(CAP_SYS_RESOURCE))
232 return -EPERM;
233
234 err = mnt_want_write_file(filp);
235 if (err)
236 return err;
237
238 if (copy_from_user(&input, (struct ext3_new_group_input __user *)arg,
239 sizeof(input))) {
240 err = -EFAULT;
241 goto group_add_out;
242 }
243
244 err = ext3_group_add(sb, &input);
245 journal_lock_updates(EXT3_SB(sb)->s_journal);
246 err2 = journal_flush(EXT3_SB(sb)->s_journal);
247 journal_unlock_updates(EXT3_SB(sb)->s_journal);
248 if (err == 0)
249 err = err2;
250group_add_out:
251 mnt_drop_write_file(filp);
252 return err;
253 }
254 case FITRIM: {
255
256 struct super_block *sb = inode->i_sb;
257 struct fstrim_range range;
258 int ret = 0;
259
260 if (!capable(CAP_SYS_ADMIN))
261 return -EPERM;
262
263 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
264 sizeof(range)))
265 return -EFAULT;
266
267 ret = ext3_trim_fs(sb, &range);
268 if (ret < 0)
269 return ret;
270
271 if (copy_to_user((struct fstrim_range __user *)arg, &range,
272 sizeof(range)))
273 return -EFAULT;
274
275 return 0;
276 }
277
278 default:
279 return -ENOTTY;
280 }
281}
282
283#ifdef CONFIG_COMPAT
284long ext3_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
285{
286
287 switch (cmd) {
288 case EXT3_IOC32_GETFLAGS:
289 cmd = EXT3_IOC_GETFLAGS;
290 break;
291 case EXT3_IOC32_SETFLAGS:
292 cmd = EXT3_IOC_SETFLAGS;
293 break;
294 case EXT3_IOC32_GETVERSION:
295 cmd = EXT3_IOC_GETVERSION;
296 break;
297 case EXT3_IOC32_SETVERSION:
298 cmd = EXT3_IOC_SETVERSION;
299 break;
300 case EXT3_IOC32_GROUP_EXTEND:
301 cmd = EXT3_IOC_GROUP_EXTEND;
302 break;
303 case EXT3_IOC32_GETVERSION_OLD:
304 cmd = EXT3_IOC_GETVERSION_OLD;
305 break;
306 case EXT3_IOC32_SETVERSION_OLD:
307 cmd = EXT3_IOC_SETVERSION_OLD;
308 break;
309#ifdef CONFIG_JBD_DEBUG
310 case EXT3_IOC32_WAIT_FOR_READONLY:
311 cmd = EXT3_IOC_WAIT_FOR_READONLY;
312 break;
313#endif
314 case EXT3_IOC32_GETRSVSZ:
315 cmd = EXT3_IOC_GETRSVSZ;
316 break;
317 case EXT3_IOC32_SETRSVSZ:
318 cmd = EXT3_IOC_SETRSVSZ;
319 break;
320 case EXT3_IOC_GROUP_ADD:
321 break;
322 default:
323 return -ENOIOCTLCMD;
324 }
325 return ext3_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
326}
327#endif
328
